It seems there is no other way to specify stack size on std::thread than linker
flags and the effective flags are named differently in many toolchains. On
toolchains where pthread is always available, this patch changes the stack
size change in our C++ code via pthread to ensure a minimum stack size of 8MB,
instead of relying on linker defaults which may be platform-specific.
Also raises default stack size on OSX to current Linux default (8MB) just to
be safe.
Closes https://github.com/official-stockfish/Stockfish/pull/2303
No functional change
/// adjust it to TH_STACK_SIZE. The implementation calls pthread_create() with
/// proper stack size parameter.
-#if defined(__APPLE__)
+/// On toolchains where pthread is always available, ensure minimum stack size
+/// instead of relying on linker defaults which may be platform-specific.
+
+#if defined(__APPLE__) || defined(__MINGW32__) || defined(__MINGW64__)
#include <pthread.h>
-static const size_t TH_STACK_SIZE = 2 * 1024 * 1024;
+static const size_t TH_STACK_SIZE = 8 * 1024 * 1024;
template <class T, class P = std::pair<T*, void(T::*)()>>
void* start_routine(void* ptr)